Oops, it doesn't look like 'or world day' is a national day..

Other days

boba

Boba Day
comfy

Comfy Day
singles

Singles Day
lost sock memorial

Lost Sock Memorial Day
artists

Artists Day
pampering

Pampering Day
ruby

Ruby Day
lash

Lash Day
cursing

Cursing Day
bow tie

Bow Tie Day